Yes, it works with normal ports -USB or otherwise. However the Espressobin seems to operate all three ports in switch mode and I have not been able to see traffic passing between any of the ports – only traffic I can see is what is destined for the single port I am sniffing.
This board is interesting to me because of its price and built-in NICs, but only if I can mirror/sniff the packets crossing the LANX ports.